The story’s surprising ending contributes to its overall structure by bringing a powerful and tragic conclusion to the thematic exploration of freedom and oppression. Mrs. Mallard's initial reaction to her husband's death highlights her feelings of liberation, as she envisions a life free from the constraints of her marriage. However, this brief sense of hope is abruptly shattered by the revelation of her husband’s survival, leading to her own demise.
The structure can be seen as a progression from the initial grief and shock to a moment of personal awakening, and finally to a tragic end that underscores the story's themes. Thus, Mrs. Mallard's unexpected death serves to bring the story full circle, reinforcing the constraining nature of her life and the ultimate costs of societal expectations on women. The abrupt ending creates a poignant commentary on the complexities of freedom and the devastating impact of repression, making it central to the overall narrative arc.